Cape Wrath Finale (spoilers!)

I didn't watch Cape Wrath but my mum followed it avidly and watched the finale on E4 through the week. She has asked me to ask you all what you thought the final scene meant when he was in the desert type place, and Meadowlands was like an oasis in the middle

Euh!
Sorry, just watched final episode and ......euh??
So how did that Samantha get to see her dad? How did they all get in there?
They can't be dead or she wouldn't have been able to see her dad, would she?